No bones fragments were observed in the soil samples scientists extracted and sent to Michigan State University for further testing.

Results, originally expected to be ready Monday morning, were released Tuesday afternoon.

"Our department just received the soil sample report from Michigan State University, after a battery of tests; the samples submitted for examination showed no signs of human decomposition," Rosevill Police Chief James Berlin said in a release issued after 3 p.m. Tuesday. "As a result of these tests the Roseville Police Department will be concluding there investigation into the possible interment of a human body upon the property."

A tipster prompted the thorough investigation when he told police that the former homeowner — a bookmaker for the late Anthony Giacalone, a Detroit Mafia official suspected in Hoffa's disappearance — spent the night Hoffa vanished pouring concrete at the Roseville home, the Detroit Free Press reported (full story).

The Free Press reported that Roseville police were skeptical, based on the timeline, that Hoffa was buried beneath the property at the address but proceeded with the investigation based on the tip and belief that remains could be there.

Hoffa planned to meet Detroit mobster Anthony Tony Jack Giacalone and
New Jersey labor leader Anthony Tony Pro Provenzano, who also happened
to be a made member of the Genovese crime family, at the Machus Red Fox
Restaurant and called his wife when no one had showed for the
appointment as of 2:15 p.m.

He was last seen by a truck driver in
a maroon 1975 Mercury Marquis Brougham with a long object covered with a
gray blanket between Hoffa and another unidentified man, according to Tru TV's Crime Library.